Richtek's RT1025 is an integrated AFE solution for heart-rate monitoring and measurements. The RT1025 integrates low noise voltage and current sensing channels and is capable of sensing ECG (electrocardiography) and PPG (photoplethysmography) simultaneously. The RT1025 have >100 dB dynamic range and can sense pulses accurately by detecting the heart’s electric signals. The sampling rates of the high-precision voltage and current sensing channels in the RT1025 are configurable between 64 kHz to 4 kHz. The RT1025 solution needs only a few discrete components and is easy to use for low-power medical ECG/PPG, sports, and fitness applications. With high levels of integration and high-precision voltage and current sensing channels, the RT1025 solution is suitable for scalable medical instrumentation systems. The RT1025 is available in a 3.1 mm x 3.4 mm, 41-ball, 0.4 mm pitch, WL-CSP package.

The daughter board (DTB) was developed to bring out all the RT1025 pins to DIP pins. The daughter board includes the RT1025 together with the required 32 kHz Xtal and the passive components to quickly evaluate the operation and performance of the RT1025. The detailed schematic, hardware, and bench measure procedure are described in the datasheet. The daughter board number is PCB107_V1, and the dimensions are 3.3 cm x 3.3 cm.